CN105723199A - Device for measuring optical properties - Google Patents
Device for measuring optical properties Download PDFInfo
- Publication number
- CN105723199A CN105723199A CN201480063352.XA CN201480063352A CN105723199A CN 105723199 A CN105723199 A CN 105723199A CN 201480063352 A CN201480063352 A CN 201480063352A CN 105723199 A CN105723199 A CN 105723199A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- light
- insertion loss
- mensuration
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims description 34
- 239000013307 optical fiber Substances 0.000 claims abstract description 83
- 238000003780 insertion Methods 0.000 claims abstract description 49
- 230000037431 insertion Effects 0.000 claims abstract description 49
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000005286 illumination Methods 0.000 description 14
- 239000000835 fiber Substances 0.000 description 6
- 239000012190 activator Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
This invention provides a device for measuring an optical-fiber component, said device being capable of obtaining measurement results for insertion loss with a high degree of reproducibility and without using a large amount of optical fiber. Said device contains a light source (3) that emits measuring light (DL), an optical fiber (7), and a launch connector (9). The measuring light (DL) enters the optical fiber (7) from one end thereof, and the launch connector (9) is connected to the other end of the optical fiber (7). The measuring light (DL) that enters the optical fiber (7) has a numerical aperture (NA[beta]) that yields an insertion loss (L[beta]) corresponding to the insertion loss (L[alpha]) due to steady-state excitation in the optical fiber (7).
Description
Technical field
The present invention relates to the equipment of the optical characteristics being suitable for the optical fiber components that mensuration is representative with optical connector.
Background technology
Optical fiber is divided into the multimode fibre (Multimodeopticalfiber) by various modes and only by the single-mode fiber (Singlemodeopticalfiber) of single-mode.Multimode fibre is divided into graded index (GI) the type optical fiber that the index distribution of index distribution uniform step index (SI) the type optical fiber of in-core and in-core is slowly varying.
SI type optical fiber is used widely at industrial field, automotive field.
Include SI type optical fiber, about itself the experimental technique of insertion loss of multimode fibre, JISC6823 specify.But, as disclosure described in Patent Document 1, to use premised on fully long optical fiber, but meet this premise in the optical fiber of circulation is not be easy to this loss experimental technique yet.
On the other hand, about the optical fiber components such as optical connector constituted required for the optical transport road comprising optical fiber, also need also exist for optical fiber measuring the optical characteristics including insertion loss.Insertion loss about the optical connector that SI type optical fiber uses, it is stipulated that at JISC5961.But, even if being measured in accordance with JISC5961, the result every time measured also has difference, and can not get repeatability in measurement result is often occur.Generally, mensuration is to make mensuration light incide the optical fiber being connected with optical connector and carry out, but when measuring, because of various factors, the photodistributed state in optical fiber may not necessarily be identical every time, here it is reason.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2007-46973 publication.
Summary of the invention
The problem that invention to solve
In order to make the light distribution in optical fiber stable, it is suitable for stable state mould when measuring and encourages, thus can obtain the repeatability of measurement result.But, in order to realize this repeatability, still need fully long optical fiber.As an example, if being plastic envelope multimode fibre, then need the length of more than 2km.But, commercially available optical fiber length is also with regard to hundreds of about m, and the mensuration therefore in fact carried out under the excitation of stable state mould is inconvenient.
The present invention conceives based on such technical task, it is therefore intended that provide the optical fiber that need not grow very much and energy repeatability obtains the mensuration equipment of optical characteristics of measurement result of insertion loss well.
For solving the scheme of problem
Under relevant purpose, the mensuration equipment of the optical characteristics of the present invention, it is characterised in that possess: light source, outgoing measures light；Optical fiber, possesses end side and another side, measures light incident from end side；And exit end, it is connected with another side of optical fiber, optical fiber input can be obtained the stable state mould with optical fiber and encourage the insertion loss L causedαCorresponding insertion loss LβNumerical aperture NAβMensuration light.
According to the research of the present inventor, the insertion loss L in attaching adapter (launchconnector)βWith the NA(numerical aperture measuring light (incident illumination)) it is in proportionate relationship.Then, the present inventor is conceived to scenario described below, i.e. uses if, with this characteristic and can obtain encouraging, with stable state mould, the insertion loss L causedαConsistent insertion loss LβNA, it is possible to reproduce, at optical fiber, the distribution of light that the excitation of stable state mould causes.
In the mensuration equipment of the present invention, numerical aperture NAβMake insertion loss LβWith insertion loss LαUnanimously, this is most preferred for the distribution reproducing the light that the excitation of stable state mould causes at optical fiber.However, it is contemplated that deviation, for instance the surplus of ± 15% is set, within the scope of this, sets numerical aperture NAβAlso may be used.
The mensuration equipment of the invention above, when for mensuration, if numerical aperture NAβMensuration light incident optical, then can be now able to be measured to, at optical fiber, the insertion loss L that the distribution of the light caused with the excitation of stable state mould is equal againβThe distribution of light.
Invention effect
According to the sensing equipment of the present invention, it is not necessary to use very long optical fiber and can be now able to be measured to, at optical fiber, the insertion loss L that the distribution of the light caused with the excitation of stable state mould is equal againβThe distribution of light, therefore, it is possible to repeatability obtains the measurement result of optical characteristics, insertion loss well.
Accompanying drawing explanation
Fig. 1 illustrates the mensuration equipment in present embodiment, and (a) illustrates its schematic configuration, and (b), (c) illustrate the summary of the determination step of insertion loss.
Fig. 2 illustrates the variation of the mensuration equipment in present embodiment.
Fig. 3 illustrates the insertion loss L in the NA of incident illumination and attaching adapterβIt is in the experimental result of proportionate relationship.
Fig. 4 is the table of the example of the relation of the insertion loss illustrating that the stable state mould of each optical fiber encourages in insertion loss, the NA of incident illumination and the attaching adapter caused.
The example of Fig. 4 is shown in the figure in the structure of mensuration equipment by Fig. 5.
Detailed description of the invention
Hereinafter, based on embodiment shown in the drawings, describe the present invention in detail.
The mensuration of the optical characteristics of the optical fiber components involved by present embodiment equipment 1, as it is shown in figure 1, the attaching adapter 9 of another side of the optical fiber 7 being connected with light source module 2 by light source module 2, end side and connection optical fiber 7 is constituted.Measure with equipment 1 as shown in Fig. 1 (c), when attaching adapter 9 being mounted for optical connector 10 measuring object, irradiating from light source module 2 to optical connector 10 and measuring light DL, measure the intensity P measuring light DL by optical connector 101.On the other hand, as shown in Fig. 1 (b), under the free state of mensuration equipment 1 not installing optical connector 10, first measure the intensity P measuring light DL from attaching adapter 9 outgoing0.By the intensity P measured1With intensity P0The measurement result of the insertion loss of optical connector 10 can be obtained.Measure the intensity P of light DL0、P1As it is shown in figure 1, utilize light power meter 11 to measure.As the measuring principle of light power meter 11, generally use hot-cast socket type or opto-electronic conversion type, but which kind of uses all may be used.
Light source module 2 is by light source 3, guide the such as cuff (ferrule) 5 of the end side measuring the optical system 4 of light DL and fixing optical fiber 7 from light source 3 outgoing to constitute efficiently.
Light source 3 can use as the laser diode of stabilized light source, light emitting diode, but is not limited to this, also can adopt the white light source employing Halogen light etc..Optical system 4 is specifically made up of one or more optical lenses.
The mensuration light DL from attaching adapter 9 outgoing utilizing mensuration equipment 1 carrys out practical measurement insertion loss Lβ.Optical fiber 7 uses the hard polymer cladded-fiber of length 1m, core diameter/cladding diameter=200 μm/230 μm, numerical aperture (NA:NumericalAperture)=037.It addition, make from light source 3 to optical fiber 7 incidence NA 0.05～0.60 the light of range changing.As this incident illumination, it is possible to adopt Gaussian beam.On the other hand, utilize the optical fiber that same size and length are 2km to make steady stimulation pattern, and determine the insertion loss L of this optical fiber 7α.The results are shown in table 1, and then figure 3 illustrates the result after the result being similar to resolution table 1 with straight line.
[table 1]
As shown in table 1 and Fig. 3, it is known that relative to the NA of incident illumination, insertion loss LβInvest well on straight line.It addition, to insertion loss LβResult and stable state mould encourage the insertion loss L that causesα(=1.04) contrast, then by the NA of incident illumination is set to about 0.45, it is possible to make insertion loss LβConsistent or be similar to stable state mould and encourage the insertion loss L causedα.That is, by adjusting the NA of incident illumination, it is possible to reproduce the photodistributed state equal with the light that the excitation of stable state mould causes.
When this experimental example, relative to the NA0.37 of optical fiber, with the NA(0.45 of incident 1.2 times of mensuration equipment 1) light.It can be considered that set the NA of light for the deviation of insertion loss.Such as, if setting the surplus based on deviation as ± 15%, then relative to the NA of optical fiber, utilize the light of NA of 0.95～1.5 times to measure connector loss.
Based on result above, illustrate to make the step of mensuration equipment 1.
[stable state mould encourages the insertion loss L causedαMeasure]
First, about applicable optical fiber 7, obtain stable state mould and encourage the insertion loss (L causedα).Stable state mould encourages if it is known that just use this value, it is also possible to re-start the experiment for obtaining insertion loss.Additionally, first obtain other specifications of above-mentioned optical fiber 7.
There are many types and be standardized in optical fiber 7, therefore corresponds to be applicable to the kind of the optical fiber 7 of mensuration equipment 1, first obtains stable state mould and encourages the insertion loss L causedα.It is assumed that mensuration equipment 1 to be suitable for the optical fiber 7 of the standard being called " optical fiber X ", " optical fiber Y ", " optical fiber Z ", then as shown in Figure 4, obtain stable state mould by the kind (X, Y, Z) of each optical fiber 7 suitable in mensuration equipment 1 and encourage the insertion loss L causedα。
[measure with the insertion loss L in equipment 1βMeasure]
Then, utilize comprise optical fiber 7, attaching adapter 9 mensuration equipment 1 to measure insertion loss.This mensuration changes the NA of the light to optical fiber 7 incidence by the kind of each optical fiber 7 and carries out.So, as shown in Figure 4, it is possible to by the kind of each optical fiber 7, obtain the determination data (L corresponding with insertion loss for NA of lightβ).
[determination of incident illumination]
Then, by by insertion loss LαDetermination data L with insertion lossβComparison, it is determined that the NA of the incident illumination of the photodistributed state equal with the light that the excitation of stable state mould causes can be reproduced in mensuration equipment 1.The example of Fig. 4 illustrates when to adopt optical fiber X be 0.43, optical fiber Y is 0.35, optical fiber Z be 0.58 NA time, in mensuration with in equipment 1, when adopting the optical fiber 7 of corresponding kind, it is possible to reproduce the photodistributed state equal with the light that the excitation of stable state mould causes.Additionally, below the NA of photodistributed state equal for the light that can reproduce with the excitation of stable state mould causes is called reproduction NA.
Reproduce NA be not limited to 0.43 when optical fiber X, as described above it can be considered that deviation and be set.
[measuring with the making of equipment 1]
If obtaining reproducing NA, in the way of becoming reproduction NA, just adjust the incident illumination of mensuration equipment 1.Such as, if as it is shown in figure 5, be the mensuration equipment 1 that optical fiber X is used as optical fiber 7, then the NA making incident illumination is 0.43, similarly, to make the NA of the incident illumination of the mensuration equipment 1 of employing optical fiber Y be 0.36, adopts the NA of the incident illumination of the mensuration equipment 1 of optical fiber X is 0.58.
The refractive index that NA is the medium being set between θ, object and object lens by the maximum angle of the optical axis relative to the light incident from object (in the present embodiment light source 3) to object lens (in the present embodiment optical system 4) is n(air, n=1), below formula (1) provide.Therefore, when adjusting the NA of incident illumination, based on this formula (1), light source 3 and the adjustment of optical system 4 are carried out.
NA=n sin θ (1)
[measuring by the structure of equipment 1]
The mensuration equipment 1 made by above step possesses following important document.
That is, mensuration equipment 1 is configured to obtain the insertion loss L of the optical fiber 7 caused with the excitation of stable state mould to optical fiber 7 incident energyαCorresponding insertion loss LβThe light of NA, by this structure, the photodistributed state that mensuration equipment 1 can reproduce with the excitation of stable state mould causes light is equal.Thus, according to the mensuration equipment 1 of present embodiment, it is not necessary to use very long optical fiber and repeatability can obtain the measurement result of insertion loss well.
Above, describe the present invention based on embodiment, but without departing from the purport of the present invention, it is possible to carry out the composition enumerated in above-mentioned embodiment accepting or rejecting selection, or be suitably changed to other structures.
Measure object and be not limited to optical connector, it is possible to by need to measure the relevant various parts of optical fiber of optical characteristics, for instance, the embedment waveguide of shunt, bundling device, partial wave wave multiplexer and SI type etc. is as the object of mensuration.The field also indefinite that these light parts are applied, it is possible to suitable in various fields such as industrial field, automotive field, aerospace fields.
It addition, the mensuration object being optical characteristics with insertion loss in aforesaid way, but the present invention is not limited to this.The invention is characterised in that and use the optical fiber of shorter length also can reproduce the photodistributed state encouraging the light caused equal with stable state mould, utilize this feature can measure optical characteristics, for instance, it is possible to measure reflection loss amount etc..
It addition, such as shown in Figure 2 (a) shows, the fixed cuff 5 of Fig. 1 is replaced, it is possible to use light source module 2 removably connector 6.Attaching adapter 9 is connected at this connector 6 other end.Accordingly, for light source module 2, it is possible to connect different optical fiber 7 and be measured.
It addition, as shown in Fig. 2 (b), it is possible in the midway of optical fiber 7, activator 8 is set.By utilizing activator 8, it is possible to the state of the light in optical fiber 7 is arranged desired distribution shape, therefore, it is possible to obtain more stable measurement result.It addition, except activator 8, also can arrange in the midway of optical fiber 7 remove measure the mode light filter of unwanted light.
Label declaration
1 mensuration equipment；2 light source modules；3 light sources；4 optical systems；5 cuffs；6 connectors；7 optical fiber；8 activators；9 attaching adapters；10 optical connectors (mensuration object)；11 light power meters.
Claims (3)
1. the mensuration equipment of an optical characteristics, it is characterised in that possess:
Light source, outgoing measures light；
Optical fiber, possesses end side and another side, and described mensuration light is incident from described end side；And
Exit end, is connected with another side described in described optical fiber, measures light described in outgoing,
Described optical fiber input can be obtained the stable state mould with described optical fiber and encourage the insertion loss L causedαCorresponding insertion loss LβNumerical aperture NAβDescribed mensuration light.
2. the mensuration equipment of optical characteristics as claimed in claim 1, wherein,
Described numerical aperture NAβIncluding making described insertion loss LβWith described insertion loss LαUnanimously or to described insertion loss LαScope plus set surplus.
3. the mensuration equipment of optical characteristics as claimed in claim 1, wherein,
Described optical fiber is at described numerical aperture NAβDescribed mensuration light when inciding described optical fiber,
Realize the distribution of the light equal with the distribution of light that the excitation of described stable state mould causes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013238489A JP6162028B2 (en) | 2013-11-19 | 2013-11-19 | Optical property measuring instrument |
| JP2013-238489 | 2013-11-19 | ||
| PCT/JP2014/079232 WO2015076097A1 (en) | 2013-11-19 | 2014-11-04 | Device for measuring optical properties |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105723199A true CN105723199A (en) | 2016-06-29 |
Family
ID=53179364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480063352.XA Pending CN105723199A (en) | 2013-11-19 | 2014-11-04 | Device for measuring optical properties |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20160258840A1 (en) |
| EP (1) | EP3073242A4 (en) |
| JP (1) | JP6162028B2 (en) |
| CN (1) | CN105723199A (en) |
| WO (1) | WO2015076097A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220271834A1 (en) * | 2021-01-08 | 2022-08-25 | Panduit Corp. | Apparatus and methods for an optical multimode channel bandwidth analyzer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4220411A (en) * | 1978-08-14 | 1980-09-02 | The United States Of America As Represented By The Secretary Of The Navy | Fiber optic light launching assembly |
| US4685799A (en) * | 1986-01-13 | 1987-08-11 | The United States Of America As Represented By The Secretary Of The Navy | Integrated optical time domain reflectometer/insertion loss measurement system |
| GB2405488A (en) * | 2003-08-27 | 2005-03-02 | Meonics Ltd | Device for controlling the mode distribution in multimode optical fibre |
| CN101793600B (en) * | 2010-04-15 | 2011-04-20 | 上海交通大学 | Measuring device and method of optical fibre transmission loss factor |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165496A (en) * | 1977-12-16 | 1979-08-21 | Bell Telephone Laboratories, Incorporated | Optical fiber light tap |
| JPS54101336A (en) * | 1978-01-26 | 1979-08-09 | Nippon Telegr & Teleph Corp <Ntt> | Steady mode exciter |
| US4281925A (en) * | 1979-07-31 | 1981-08-04 | Bowmar/Ali, Inc. | Fiber optic attenuation simulator |
| JPS57116234A (en) * | 1981-01-12 | 1982-07-20 | Nippon Telegr & Teleph Corp <Ntt> | Measuring method for photo loss |
| DE3327668A1 (en) * | 1983-07-30 | 1985-02-07 | Udo Dr Ing Unrau | Arrangement for selective mode excitation or mode analysis in graded-index fibres |
| US4629316A (en) * | 1983-10-25 | 1986-12-16 | Raychem Corporation | Attenuation across optical fiber splice |
| JP2716603B2 (en) * | 1991-08-05 | 1998-02-18 | 日本電信電話株式会社 | Inspection method and apparatus for return loss of optical connector |
| JPH0530751U (en) * | 1991-09-30 | 1993-04-23 | アンリツ株式会社 | Incident NA converter |
| JPH06186460A (en) * | 1992-12-21 | 1994-07-08 | Ando Electric Co Ltd | Ld module for loss test of multimode optical fiber |
| US6177985B1 (en) * | 1996-10-01 | 2001-01-23 | Cary Bloom | Apparatus and method for testing optical fiber system components |
| US6963062B2 (en) * | 2003-04-07 | 2005-11-08 | Eksigent Technologies, Llc | Method for multiplexed optical detection including a multimode optical fiber in which propagation modes are coupled |
| JP2006038647A (en) * | 2004-07-27 | 2006-02-09 | Sumitomo Electric Ind Ltd | Optical time domain reflector measuring method |
| JP4627020B2 (en) * | 2005-08-09 | 2011-02-09 | 日本電信電話株式会社 | Method for measuring optical characteristics of multimode optical waveguide |
| JP4587911B2 (en) * | 2005-08-26 | 2010-11-24 | 日本電信電話株式会社 | Evaluation method of multimode optical waveguide |
-
2013
- 2013-11-19 JP JP2013238489A patent/JP6162028B2/en not_active Expired - Fee Related
-
2014
- 2014-11-04 WO PCT/JP2014/079232 patent/WO2015076097A1/en active Application Filing
- 2014-11-04 EP EP14863964.4A patent/EP3073242A4/en not_active Withdrawn
- 2014-11-04 CN CN201480063352.XA patent/CN105723199A/en active Pending
-
2016
- 2016-05-17 US US15/156,553 patent/US20160258840A1/en not_active Abandoned
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| US4220411A (en) * | 1978-08-14 | 1980-09-02 | The United States Of America As Represented By The Secretary Of The Navy | Fiber optic light launching assembly |
| US4685799A (en) * | 1986-01-13 | 1987-08-11 | The United States Of America As Represented By The Secretary Of The Navy | Integrated optical time domain reflectometer/insertion loss measurement system |
| GB2405488A (en) * | 2003-08-27 | 2005-03-02 | Meonics Ltd | Device for controlling the mode distribution in multimode optical fibre |
| CN101793600B (en) * | 2010-04-15 | 2011-04-20 | 上海交通大学 | Measuring device and method of optical fibre transmission loss factor |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20160258840A1 (en) | 2016-09-08 |
| JP2015099066A (en) | 2015-05-28 |
| EP3073242A4 (en) | 2017-06-28 |
| EP3073242A1 (en) | 2016-09-28 |
| WO2015076097A1 (en) | 2015-05-28 |
| JP6162028B2 (en) | 2017-07-12 |
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